Windmill.



, PATENTED APR. 1e, 1907. o. B. DBMPSTER a. H. s. MQLONY.

W-INDMILL. APPLI'GATION FILED JAN. 2z, 1907..

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WINDMILL APPLICATION FILED JAN. 22, 1907.

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CHARLES B. DEMPSTER AND HARRY STUART MOLCNY, OF BEATRICE,

NEBRASKA, ASSIGNORS TO DEMPSTER MILL MANUFACTURING COM- PANY, OFBEATRICE, NEBRASKA.

WINDIVIILL.. f

Specification of Letters Patent.

ratented April 16, 1907.

Our invention relates to windmill con- Y struction, and especially toimproved mechanism for transmitting the power of the wind-wheel to thepitman and pump-rod.

In the accompanying drawings, Figure 1 is a side elevation of some ofthe working parts of a windmill-head, certain parts being omitted andother parts broken away for greater clearness. Fig. 2 is an endelevation of the same, partly in vertical section and viewed from theleft-hand side of Fig. 1. Fig. 3 is a detail view of the main gear-wheeland crank-shaft detached, showing our special means of applying thepower of the gear to the crank.

1 indicates the wind-wheel shaft, which is journaled in boxes 2, locatedon each side of the vertical plane of operation ofthe pitman 3. Saidshaft carries ay pinion 4, which meshes with a gear-wheel 5, mounted onthe crank-shaft 6. Said pinion and gear are provided with circularextensions 7 8 on the pitch-line of their teeth, which extensionsreceive the impact of the two wheels and prevent their teeth frommeshing too closely.

9 indicates the upwardly-extending arms of the main casting of thewindmill-head. To the upper ends of and between said arms is pivoted oneend of a duplex rocking lever 10, to the opposite end of which lever, at17, is pivotally connected the vertically-acting plunger 11, whichextends downwardly to a connection with the pump rod. (Not shown.) At anintermediate point 18 on said rocking lever 10 is pivoted the pitman 3,carrying the head 12, mounted on the crank 13 and actuated thereby.

A peculiarity of our invention consists in the means of imparting powerto the crank. The crank-shaft 6 is journaled in boxes 1,4 on each sideof the pitman-well. The gear 5, which is mounted on said crank-shaft inclose juxtaposition with one 0f the radial arms of the crank, is notkeyed or splined to said shaft in the usual manner, but fits the shaftloosely. Cnthe face of said gear which is toward the crank and at asuitable distance from the center of the gear (see Fig. 3) are providedtwo lugs 15, which extend outward in such a manner as to include betweenthem one of the radial arms of the crank and bear against said arm oneach side thereof.

Any preferred means may be adopted for holding the gear in closejuxtaposition with the crank-arm, such as set-screws 16, extendingthrough the lugs 15 and bearing against said arm.

It is obvious that when the power of pinion f1 is applied to gear 5 thelatter must rotate and will carry with it the crank 13 in the samemanner as if the gear were keyed to the crank-shaft in the usual way.The advantage of this construction consists in the lessening of thestrain on the hub of the gear and the weakening of the shaft, both ofwhich occur when the gear is keyed to the shaft. Our constructionlocates the point where the power is actually applied to the shaft, noton the shaft proper, but on the crank and at some distance from theshaft, thus relieving the shaft and gear from unnecessary strains.

Any other preferred means for connecting the gear 5 with the crank-arm,so as to transmit power to the crank in substantially the same manner asherein described, may be substituted for the lugs 15, and we thereforedo not limit our claims to the specific connecting means shown. v

We claim as our invention and desire to secure by Letters Patent- 1. Ina windmill, the combination of the wind-wheel shaft, a crank-shaftmounted parallel with said wheel-shaft, a crank, a pitman pivoted onsaid crank to move in a vertical plane, bearings for said crank-shaft oneach side of the plane of movement of the pitman, a pinion on saidwheel-shaft, a gear driven by said inion and loosely mounted on saidcrank-s aft in juxtaposition with a radial arm of the crank, means forconnecting said gear with said radial arm so that the rotation of thegear will turn the crank, a plune ger, and suitable operativeconnections between said plunger and said pitman. x

2. In a windmill, the combination of the wind-wheel shaft, a crank-shaftparallel with IOO said wheel-shaft, a crank, a pitman ivotedA 'ion onsaid wheel-shaft, a l gear loosely mounted on said crank-shaft anddriven by said pinion, lugs projecting from the face oi said gear, uponeach side of the crank and bearing against said crank to rotate the samein either direction, a plunger, and means for operatively connectingsaid plunger with the pitman.

3. In a windmill, the combination of the wind-wheel shaft, a crank-shaftparallel with said wheel-shaft, a crank, a pitman mounted on said crankto move in a vertical plane, bearings for said crank-shaft on each sideof the plane of movement of the pitman, a pinion on said wheel-shaft, agear loosely mounted on said crank-shaft and driven by said pinion, saidpinion and gear having lateral extensions at the pitch-line of theirteeth, adapted to bear against each other and prevent said teeth frommeshing too closely, lugs projecting from the face of said gear, uponeach side of the crank, and bearing connections between said plunger andthe pitman.V

4. In a windmill-head, the combination of the mainframe, the wind-wheelshaft, a crankshaft parallel with said wheel-shaft, a crank, a pitmanmounted on said crank to move in a vertical plane, bearings for saidcrank-shaft on each side of the plane of movement of the pitman, apinion on said wheel-shaft, a gear driven by said pinion and mounted onsaid crank-shaft in juxtaposition with a radial arm of the crank, meansfor connecting said gear with said radial arm so that the rotation ofthe gear will turn the crank, a rocking arm pivoted to the main frameand actuated by said pitrnan, and a vertically-acting plunger operatedby said rocking arm.

In testimony whereof we aHiX our signatures in presence of two witnesses,

CHARLES B. DEMPSTER. HARRY STUART MOLONY. Witnesses:

W. Z. VARNER, R. H. YALE;

